a8a99a628f
Add optional parameter to VideoTexture.Texture refresh() method to specify timestamp (in seconds from start of movie) of the frame to be loaded. This value is passed down to image source and for VideoFFmpeg source, it is used instead of current time to load the frame from the video file. When combined with an audio actuator, it can be used to synchronize the sound and the image: specify the same video file in the sound actuator and use the KX_SoundActuator time attribute as timestamp to refresh: the frame corresponding to the sound will be loaded: GameLogic.video.refresh(True, soundAct.time)
331 lines
10 KiB
C++
331 lines
10 KiB
C++
/* $Id$
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-----------------------------------------------------------------------------
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This source file is part of VideoTexture library
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Copyright (c) 2007 The Zdeno Ash Miklas
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA, or go to
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http://www.gnu.org/copyleft/lesser.txt.
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-----------------------------------------------------------------------------
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*/
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// implementation
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#include <PyObjectPlus.h>
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#include <structmember.h>
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#include "GL/glew.h"
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#include "Texture.h"
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#include "ImageBase.h"
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#include "FilterSource.h"
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#include "ImageViewport.h"
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// constructor
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ImageViewport::ImageViewport (void) : m_alpha(false), m_texInit(false)
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{
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// get viewport rectangle
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glGetIntegerv(GL_VIEWPORT, m_viewport);
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// create buffer for viewport image
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m_viewportImage = new BYTE [4 * getViewportSize()[0] * getViewportSize()[1]];
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// set attributes
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setWhole(false);
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}
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// destructor
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ImageViewport::~ImageViewport (void)
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{ delete m_viewportImage; }
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// use whole viewport to capture image
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void ImageViewport::setWhole (bool whole)
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{
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// set whole
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m_whole = whole;
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// set capture size to viewport size, if whole,
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// otherwise place area in the middle of viewport
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for (int idx = 0; idx < 2; ++idx)
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{
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// capture size
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m_capSize[idx] = whole ? short(getViewportSize()[idx])
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: calcSize(short(getViewportSize()[idx]));
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// position
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m_position[idx] = whole ? 0 : ((getViewportSize()[idx] - m_capSize[idx]) >> 1);
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}
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// init image
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init(m_capSize[0], m_capSize[1]);
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// set capture position
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setPosition();
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}
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void ImageViewport::setCaptureSize (short * size)
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{
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m_whole = false;
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if (size == NULL)
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size = m_capSize;
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for (int idx = 0; idx < 2; ++idx)
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{
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if (size[idx] < 1)
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m_capSize[idx] = 1;
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else if (size[idx] > getViewportSize()[idx])
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m_capSize[idx] = short(getViewportSize()[idx]);
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else
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m_capSize[idx] = size[idx];
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}
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init(m_capSize[0], m_capSize[1]);
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// set capture position
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setPosition();
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}
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// set position of capture rectangle
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void ImageViewport::setPosition (GLint * pos)
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{
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// if new position is not provided, use existing position
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if (pos == NULL) pos = m_position;
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// save position
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for (int idx = 0; idx < 2; ++idx)
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m_position[idx] = pos[idx] < 0 ? 0 : pos[idx] >= getViewportSize()[idx]
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- m_capSize[idx] ? getViewportSize()[idx] - m_capSize[idx] : pos[idx];
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// recalc up left corner
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for (int idx = 0; idx < 2; ++idx)
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m_upLeft[idx] = m_position[idx] + m_viewport[idx];
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}
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// capture image from viewport
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void ImageViewport::calcImage (unsigned int texId, double ts)
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{
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// if scale was changed
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if (m_scaleChange)
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// reset image
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init(m_capSize[0], m_capSize[1]);
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// if texture wasn't initialized
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if (!m_texInit)
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{
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// initialize it
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loadTexture(texId, m_image, m_size);
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m_texInit = true;
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}
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// if texture can be directly created
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if (texId != 0 && m_pyfilter == NULL && m_capSize[0] == calcSize(m_capSize[0])
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&& m_capSize[1] == calcSize(m_capSize[1]) && !m_flip)
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{
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// just copy current viewport to texture
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glBindTexture(GL_TEXTURE_2D, texId);
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glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1]);
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// image is not available
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m_avail = false;
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}
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// otherwise copy viewport to buffer, if image is not available
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else if (!m_avail)
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{
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// get frame buffer data
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if (m_alpha)
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{
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glReadPixels(m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1], GL_RGBA,
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GL_UNSIGNED_BYTE, m_viewportImage);
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// filter loaded data
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FilterRGBA32 filt;
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filterImage(filt, m_viewportImage, m_capSize);
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}
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else
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{
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glReadPixels(m_upLeft[0], m_upLeft[1], (GLsizei)m_capSize[0], (GLsizei)m_capSize[1], GL_RGB,
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GL_UNSIGNED_BYTE, m_viewportImage);
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// filter loaded data
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FilterRGB24 filt;
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filterImage(filt, m_viewportImage, m_capSize);
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}
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}
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}
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// cast Image pointer to ImageViewport
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inline ImageViewport * getImageViewport (PyImage * self)
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{ return static_cast<ImageViewport*>(self->m_image); }
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// python methods
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// get whole
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PyObject * ImageViewport_getWhole (PyImage * self, void * closure)
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{
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if (self->m_image != NULL && getImageViewport(self)->getWhole()) Py_RETURN_TRUE;
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else Py_RETURN_FALSE;
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}
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// set whole
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int ImageViewport_setWhole (PyImage * self, PyObject * value, void * closure)
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{
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// check parameter, report failure
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if (value == NULL || !PyBool_Check(value))
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{
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PyErr_SetString(PyExc_TypeError, "The value must be a bool");
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return -1;
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}
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// set whole
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if (self->m_image != NULL) getImageViewport(self)->setWhole(value == Py_True);
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// success
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return 0;
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}
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// get alpha
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PyObject * ImageViewport_getAlpha (PyImage * self, void * closure)
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{
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if (self->m_image != NULL && getImageViewport(self)->getAlpha()) Py_RETURN_TRUE;
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else Py_RETURN_FALSE;
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}
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// set whole
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int ImageViewport_setAlpha (PyImage * self, PyObject * value, void * closure)
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{
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// check parameter, report failure
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if (value == NULL || !PyBool_Check(value))
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{
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PyErr_SetString(PyExc_TypeError, "The value must be a bool");
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return -1;
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}
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// set alpha
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if (self->m_image != NULL) getImageViewport(self)->setAlpha(value == Py_True);
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// success
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return 0;
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}
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// get position
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static PyObject * ImageViewport_getPosition (PyImage * self, void * closure)
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{
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return Py_BuildValue("(ii)", getImageViewport(self)->getPosition()[0],
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getImageViewport(self)->getPosition()[1]);
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}
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// set position
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static int ImageViewport_setPosition (PyImage * self, PyObject * value, void * closure)
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{
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// check validity of parameter
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if (value == NULL || !PySequence_Check(value) || PySequence_Length(value) != 2
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|| !PyLong_Check(PySequence_Fast_GET_ITEM(value, 0))
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|| !PyLong_Check(PySequence_Fast_GET_ITEM(value, 1)))
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{
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PyErr_SetString(PyExc_TypeError, "The value must be a sequence of 2 ints");
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return -1;
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}
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// set position
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GLint pos [] = {
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GLint(PyLong_AsSsize_t(PySequence_Fast_GET_ITEM(value, 0))),
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GLint(PyLong_AsSsize_t(PySequence_Fast_GET_ITEM(value, 1)))
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};
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getImageViewport(self)->setPosition(pos);
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// success
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return 0;
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}
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// get capture size
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PyObject * ImageViewport_getCaptureSize (PyImage * self, void * closure)
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{
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return Py_BuildValue("(ii)", getImageViewport(self)->getCaptureSize()[0],
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getImageViewport(self)->getCaptureSize()[1]);
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}
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// set capture size
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int ImageViewport_setCaptureSize (PyImage * self, PyObject * value, void * closure)
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{
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// check validity of parameter
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if (value == NULL || !PySequence_Check(value) || PySequence_Length(value) != 2
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|| !PyLong_Check(PySequence_Fast_GET_ITEM(value, 0))
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|| !PyLong_Check(PySequence_Fast_GET_ITEM(value, 1)))
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{
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PyErr_SetString(PyExc_TypeError, "The value must be a sequence of 2 ints");
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return -1;
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}
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// set capture size
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short size [] = {
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short(PyLong_AsSsize_t(PySequence_Fast_GET_ITEM(value, 0))),
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short(PyLong_AsSsize_t(PySequence_Fast_GET_ITEM(value, 1)))
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};
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getImageViewport(self)->setCaptureSize(size);
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// success
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return 0;
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}
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// methods structure
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static PyMethodDef imageViewportMethods[] =
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{ // methods from ImageBase class
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{"refresh", (PyCFunction)Image_refresh, METH_NOARGS, "Refresh image - invalidate its current content"},
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{NULL}
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};
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// attributes structure
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static PyGetSetDef imageViewportGetSets[] =
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{
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{(char*)"whole", (getter)ImageViewport_getWhole, (setter)ImageViewport_setWhole, (char*)"use whole viewport to capture", NULL},
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{(char*)"position", (getter)ImageViewport_getPosition, (setter)ImageViewport_setPosition, (char*)"upper left corner of captured area", NULL},
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{(char*)"capsize", (getter)ImageViewport_getCaptureSize, (setter)ImageViewport_setCaptureSize, (char*)"size of viewport area being captured", NULL},
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{(char*)"alpha", (getter)ImageViewport_getAlpha, (setter)ImageViewport_setAlpha, (char*)"use alpha in texture", NULL},
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// attributes from ImageBase class
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{(char*)"image", (getter)Image_getImage, NULL, (char*)"image data", NULL},
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{(char*)"size", (getter)Image_getSize, NULL, (char*)"image size", NULL},
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{(char*)"scale", (getter)Image_getScale, (setter)Image_setScale, (char*)"fast scale of image (near neighbour)", NULL},
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{(char*)"flip", (getter)Image_getFlip, (setter)Image_setFlip, (char*)"flip image vertically", NULL},
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{(char*)"filter", (getter)Image_getFilter, (setter)Image_setFilter, (char*)"pixel filter", NULL},
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{NULL}
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};
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// define python type
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PyTypeObject ImageViewportType =
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{
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PyVarObject_HEAD_INIT(NULL, 0)
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"VideoTexture.ImageViewport", /*tp_name*/
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sizeof(PyImage), /*tp_basicsize*/
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0, /*tp_itemsize*/
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(destructor)Image_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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0, /*tp_getattr*/
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0, /*tp_setattr*/
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0, /*tp_compare*/
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0, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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0, /*tp_hash */
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0, /*tp_call*/
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0, /*tp_str*/
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0, /*tp_getattro*/
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0, /*tp_setattro*/
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0, /*tp_as_buffer*/
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Py_TPFLAGS_DEFAULT, /*tp_flags*/
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"Image source from viewport", /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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imageViewportMethods, /* tp_methods */
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0, /* tp_members */
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imageViewportGetSets, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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(initproc)Image_init<ImageViewport>, /* tp_init */
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0, /* tp_alloc */
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Image_allocNew, /* tp_new */
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};
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